ISL6415

The ISL6415 is a highly integrated triple output regulator which provides a single chip solution for wireless chipset power management. The device integrates a high efficiency synchronous buck regulator with two ultra low noise LDO regulators. The IC accepts an input voltage range of 3.0V to 3.6V and provides three regulated output voltages: 1.2V (PWM), 1.8V (LDO1), and another ultra-clean 1.8V (LDO2).

The Synchronous current mode PWM regulator with integrated N- and P- channel power MOSFET provides preset 1.2V for BBP/MAC core supply. Synchronous rectification with internal MOSFETs is used to achieve higher efficiency and reduced number of external components. Operating frequency is typically 750kHz allowing the use of smaller inductor and capacitor values. The device can be synchronized to an external clock signal in the range of 500kHz to 1MHz. The PG_PWM output indicates loss of regulation on PWM output.

The ISL6415 also has two LDO regulators which use an internal PMOS transistor as the pass device. LDO2 features ultra low noise that does not typically exceed 30V RMS to aid VCO stability. The EN_LDO pin controls LDO1 and LDO2 outputs. The ISL6415 also integrates a RESET function, which eliminates the need for additional RESET IC required in WLAN applications. The IC asserts a RESET signal whenever the VIN supply voltage drops below a preset threshold, keeping it asserted for at least 25ms after VIN has risen above the reset threshold. The PG_LDO output indicates loss of regulation on either of the two LDO outputs. Other features include overcurrent protection for all three outputs and thermal shutdown.

High integration and the thin Quad Flat No-lead (QFN) package makes ISL6415 an ideal choice to power many of today's small form factor industry standard wireless cards such as PCMCIA, mini-PCI and Cardbus-32.